Increasingly, the resistance to Muhammed and his followers grew and they were eventually forced to emigrate from Mecca to Medina, a city 260 miles to the north in 622. This event marks the beginning of the Muslim calendar. There Muhammad was in
Prophet Muhammad was the prophet of Islam. Most of his early life was spent as a merchant. At age 40, he began to have revelations from Allah that became the basis for the Quran and the foundation of Islam. By 630 he had unified most of Arabia